The cutters of mowing-machines



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MPROVEMIINT IN MACHINE FOR HOLDING- THE CUTTERS OF MOWING-MACHIES WHILEAIBIEEING- GROUND.

The Schedule :eten-ed to in these Letters Patent and making part ofthesaine.

To all whom it may conce/m.-

Be it known that I, D. W. JAMESON, of Warren, county of Trumbull,-in theState of Ohio, have in- ,vented a new and improved Machine for GrindingHarvester-Knives; and I do hereby declare that the following is a fulland exact description thereof, ref- Aerence being had to theaccompanying drawings, and

Vsame being constructed and arranged as hereinafter described. 1

This holder consists, as shown in the drawing, of theframe A, which iscomposed of two ,uprights, A', connected by the bar B, the lower endsbeing pivoted to the foot-pieces or base B', these beingalso connectedby a cross-bar, B", as shown.

Y Secured'to the top of the uprights, and extending from one to theother, is the flanged rod C, the edges, a a, of which project andiitinto the groove b.y This groove is formed of a strip of metal, the edgesof which are bent over, formingas shown, a dovetail groove.

This ystrip or grooved bar D is secured to one e'dge of the bar D. Thus,by this means, the bar D' is allowed t0 be carried to the right or lefton the rod C, forming thereby a sliding joint, E.

To this bar D' is attached the knife to be sharpened, the said bar beingprovided 'with clutches, c c, for securing said knife to the same. Theclutches are provided with tliumb-screws, d, by means of which theclutches are tightened, to secure the knife firmly in position.

Fig. 2 is an end view of the bar D', showing the connection betweenthe-rod and bar C D, and the position of the knife.

The knife toy be sharpened is placed in the clutches on the bar D', theholder being placed so as to occupy the same position with thegrindstone as that shown in fig. 1, the operator holding the framesteady by simply placing his foot on the bar B. The knife can be easilysharpened, as it can be moved back and forth by means of the groove andbar, above referred to, until the blades are all sharpened, the uprightsA being pivoted, thus allowing the knife to be removed from the stone atany time. The knife, While being sharpened,

being held steady and iirmlyto the bar, and yet allowed to be movedtothe right or left, as maybe reu -quired, by means sof the bar D and rodO, which forms the sliding joint E, above described.

When one side of the blades is sharpened, the oppos'iteside is done byreversing the position of the ma chine from that shown in the drawing.

The construction and arrangement of this machine are independent of thegrindstone; thus any common or ordinary stone may be used, the machinebeing adjusted to the size and position of the said stone.

What I claim as my improvement, and desireto secure by Letters Patent,is-

1. The anged rod O, grooved bar D, forming the sliding joint E, asdescribed.

2; The iianged rod C, grooved bar D, in combination with the bar- D',uprights A', cross-barsB B, andfoot-pieces B', all constructed andarranged to operate as and for the purpose described.

' D. W. JAMESON. Witnesses:

GEO. W. TLBBITrs', J. HOLMES.

